D9-THC doesn't need to be heated to release the cannabinoids. Once you have your extract, let it evap, you should have a sticky honey looking substance. Depending on the MJ that you extracted it out of, it should look either amber or clear, of a mixture of the both.
Your best bet is to let it evap until that stage, then put a few drops on your tongue at a time. Then wait. If you take too much you may overdose(highly unlikely but there can always be a first time)